Commitments and Contingencies (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
Dec. 31, 2014 |
|
| Commitments and Contingencies Disclosure [Abstract] | |||||
| Deferred rent | $ 0.9 | $ 0.9 | $ 0.3 | ||
| Rent expense | 0.5 | $ 0.3 | 0.9 | $ 0.5 | |
| Total contractual commitments | 3.7 | 3.7 | |||
| Commitments due within next year | 2.9 | 2.9 | |||
| Commitments due within one to two years | 0.6 | 0.6 | |||
| Commitments due within two to three years | $ 0.2 | $ 0.2 | |||